| No. | Test item | Performance indexes (inner layer) | Performance indexes (external layer) | |
|---|---|---|---|---|
| 1 | Hardness (Shores A) Degree | 55±5 or drawing | 55±5 or drawing | |
| 2 | Tensile strength MPa | ≥10.0 | ≥10.0 | |
| 3 | Elongation at break % | 200～600 | 200～600 | |
| 4 | Tear strength DIN ISO34-1 method A kN/m | ≥5.0 | ≥5.0 | |
| 5 | Heat resistance 125℃×94h | Tensile strength Degree | 0～+6 | 0～+6 |
Elongation at break MPa | ≥9.0 | ≥9.0 | ||
Tear strength % | 180～550 | 180～550 | ||
Tear strength kN/m | ≥4.0 | ≥4.0 | ||
| 6 | Heat resistance 110℃×504h | Change in hardness Degree | 0～+8 | 0～+8 |
Tensile strength MPa | ≥9.0 | ≥9.0 | ||
Elongation atbreak % | 180～550 | 180～550 | ||
| 7 | Oil resistance 125℃×94h | Change in hardness Degree | -8～+8 | / |
Elongation at break MPa | ≥9.0 | / | ||
Tear strength % | ≥150 | / | ||
Mass change ratio % | -4～+8 | / | ||
Tear strength N/m | ≥2.5 | / | ||
| 8 | Oil resistance 110℃×504h | Change in hardness Degree | -8～+10 | / |
Tensile strength MPa | ≥9.0 | / | ||
Elongation at break % | ≥140 | / | ||
Mass change ratio % | -4～+10 | / | ||
| 9 | Diesel resistance23℃×46h | Change in hardness Degree | / | -20～0 |
Tensile strength MPa | / | 6 | ||
Elongation at break % | / | ≥180 | ||
Mass change ratio % | / | 0～+25 | ||
| 10 | Low-temperature performance （-35℃/22h） | -30℃ No breaking | -30℃ No breaking | |
| 11 | Compression permanent set PV3307 125℃X22h % | ≤85 | ≤85 | |
| 12 | Compression permanent set PV3307 23℃X94h % | ≤60 | ≤60 | |
| 13 | Copper corrosion V.W.2.8.1 | Slight oxidation trace allowable | Slight oxidation trace allowable | |
| 14 | Ozone aging (test piece not tested) 200pphm/46h/25℃/60/20% | No cracking | No cracking | |
| 15 | Ozone aging (after 125℃×94h) 200pphm/46h/25℃/60/20% VW2.8.1 | No cracking | No cracking | |
| 16 | Ozone aging (after 125℃×94hmchine oil aging ) 200pphm/46h/25℃/60/20% | No cracking | No cracking | |
| 17 | Peel strength of external layer N/mm | ≥3.0 | ≥3.0 | |
